Die and method of making the same



OctQ 1936. E. HAUMONT I DIE AND METHOD OF MAKING THE SAME Filed Sept.18, 1954 2 Sheets-Sheet l Oct. 6, 1936. E. HAUMONT 2,056,321

DIE AND METHOD OF MAKING THE SAMEv Filed Sept. 18, 1934 2 Sheets-Sheet 2Patented Oct. 6 1936 2,056,321 7 DIE AND METHOD OF MAKING THE SAMEEdmond Haumont, Paris, France, assignor to United Shoe MachineryCorporation, Paterson,

N.'J., a corporation of New Jersey Application September 18, 1934,Serial No. 144,559 In France. September 22, 1933 8 Claims. (Cl. 76-107)Thisinvention relates to dies and-is herein .illustrated as embodied ina cutting die adapted to ,produce. shoe, part blanksirom sheetmaterialsueh; as leather.

One type ofE cutting-die which has come into use in the production. ofshoe part blanks is one which comprises awblade bent to conform to, theoutline of ashoe part blank and-having oppositely disposed cutting edgeswhich can :be used in producing either right or left blanks of simislarsizes and shapes; It is an object of the present-invention to provide animproved cutting die of the type referred to which will be effective inits operation and whichat thesame time will b economical to manufacture.The cutting dies illustrated herein; which constitute preferredembodiments of the invention, each comprise two cuttingblades havingcontiguous or adjacent flangeatogether with means for securing theblades-together. Preferably and as shown, thetwo blades are weldedtogether along the flanges to form an integral construction, but theymay be held together or strengthened by two plateswhich engage the.flanges on the blades and are secured-in position by fastening devicesextending through theplates. Dies constructed asabove outlined .arewelladapted to withstand the blowsto which they are subjected and, at thesame time, the parts which make up the dies can bereadily assembled.

In another aspect, the invention relates to a method of producingcutting dies which consists inbending a flanged bladealong the edges ofa pattern corresponding in outline to a blank to be produced, whilemaintaining the flange portion .of the blade inengagement witha face ofthe pattern and with the body portion of the blade 1 in'engagement withthe edge portions of the pattern. jAsecond blade is similarly bent aboutthe pattern utilizing the opposite face of the pattern ,as, a guideforthe flange portionoi the blade, and .the two. blades arev then assembledwith their I flanged portions together to form a double-edged die. Bybending the blades as above indicated about the pattern accuracy informing the blade f sections *for producing closely corresponding blanksfor right and left shoes, for example, is g' s '7." I

flvarious'other features and objects of the invention will be apparentfrom the following detailed specification when taken in connection withthe Zaccompanyingdrawings and will be pointed out in'the claims. I

In the drawings, 7

pattern assembly;

Fig. 1 is a perspective view of a die illustrating "one embodiment oftheinvention;

Fig. 2 is a side view partly in section of the die shown in Fig. 1;

Fig. 3 is a perspective view of a die illustratin another embodiment ofthe invention;

Fig. 4' is a perspective view of a. pattern assembly which is used toform the dies;

Fig. 5 is a detailed view illustrating the step of bending one of-theblade Fig. .6 is a perspective view of the step of. bending theotherblade section about the pattern assembly; 7

Fig. '7 is a, side elevation partly in section of the die shown in'Fig.3-; and

Fig.8 is a perspective view partly in section of a portion of one oftheblades.

The die Ill-illustrated in Figs. land 2 comprises a double blade formedof two symmetrical blade sections-l2 and it having oppositely disposedcutting edges It and inturned flanges l8 which are clamped together bycorevplates 20.

.Each of the bladesectionsis formed from, a strip 1 of steel such asstrip 22 (Fig. 8), which is, L-.'

shaped in cross-section, one edge portion extending .at right angles tothe body portion as a. flange 24, and the other edge portion beingsharpened to form a cutting edge 26. Each of the blade sectionscorresponds in outline to that of a shoe.

.plates being held together by bolts 28, passing through alined openingsin the plates, and nuts 30. The flanges .l 8 serve toimpartrigidity tovthe double blade and stiffenit at the centraLportions thereof, thuspreventing likelihood of the buckling of the blade underpressure appliedto. one

or another of the cutting edges. This construction provides a reversibledie which is rugged. but which at the same timercan be readilyassembled.

For producing gagefmarks upon blanks as they are cut from the die thereare provided a pluralv l ty of stab members 32 each of which comprisesa;

shank 34 of a thickness approximately equal to the combined thickness ofthe flanges N3 of the blade sections andhaving projectingtherefrompointed portions 36 arranged to extend through holes 38 in the plates26. When the die is assections about the sembled the shank portion 34 ispositioned between the plates and the stab member is clamped in positionby the bolts 28. Preferably, and as shown, the plates 20 are providedwith openings 39 centrally thereof to facilitate the removal of cutblanks from the interior of the die. If desired, a cut-out die orpunches or other blank ornamenting devices, not shown, can be secured inthe openings 39, or held in position between the plates 20 in the sameway as the stabs 32 are. held. The fact that the plates 20 are readilydetachable facilitates the removal and assembly of such devices.

It is to be understood that the two blade sections l2 and I4 may besecured together by other means than the plates 2|] such as by weldingthe blade sections together along the .flanged portions thereof.

The modification illustrated in Figs.v 3 and '7.

comprises a die 40 having a core plate or stiffening .member 4|,upperand lower blade-sections 42 and 44, similar in shape to blade sections|2 and M of. the die l0, and havingfianges 46 and 48 which engageopposite sides of the plate 4|, the blade sections terminating inoppositely disposed cutting edges 50. In this instance the bladesections and plate are shown welded together at several points along theperiphery of the die as indicated by reference characters 52.

' In constructing the die shown in Fig. 1 or that illustrated in Fig. 3use is preferably made of a pattern assembly best illustrated in Fig. 4and which. comprises a pair of plates 54 and 55 which correspond inoutline to the outline of a blank to be produced. These plates are heldin spaced relation by means of bolts 56 which extend through alinedopenings in the plate and are secured by nuts 58, the plates being heldapart by washers, one of which is shown at 60, so that the thickness ofthe assembly is approximately that of the body portion of a cuttingblade section. By forming the pattern assembly in this manner, thenecessity for a heavy plate is avoided thus -making for economy sincethin plates of the required shape and size can be readily produced upona pattern grading machine.

In forming the dies the blade sections are shaped separately. Forexample, in producing the die 40, the cutting blade section 44 is firstshaped from a strip of material such as is shown in Fig. 8 which isfirst bent about the pattern assembly, as illustrated in Fig. 5, withthe flange 48 in engagement with the upper face of the plate 54 and thebody portion of the blade in engagement with the edges of. both plates.This serves to maintain the blade, as it is bent, perpendicular to theupper plate 54 with the result that the bending of the blade with itscutting edge substantially in one plane is assured, that is, the bodyportion of the blade will be maintained normal to the plane of thecutting edge as is necessary to produce a die which will be accurate.

The bending of the blade is continued until it has been bent entirelyabout the pattern assembly after which the ends of the blade are Weldedtogether as indicated by reference-character 62. The cutting edge isthen trued up using the plate-55 as a gage thus to make sure that theedge corresponds closely to that of. the pattern plate. The lower bladesection is'thus completed and the pattern assembly is removed therefrom.It is to *be noted that in bending the blade section about corners ofthe pattern assembly it may be necessary to remove aportion of theflange. This is done by cutting a notch therein as shown' at sides ofthe stiffening plate 4|.

, together.

;assembling the plates 54 and 55 with the blade sections 42 and 44positioned as shown in Fig. 7 with the flanges thereof contiguous onopposite The plates 54 and 55 are then positioned upon opposite sides ofthe flanges 46..and.48 and when the bolts 56' are .tightened the plateswill maintain the various parts in rigid position while the bladesections and stiffening plate 4| are welded together at various pointsalong their peripheries as indicated by reference character-52. Afterthe welding operation is completed the pattern assembly may be removed,or it may be retained as an additional stiffening means or asa supportfor blank marking or ornamenting devices. i :In the use of a dieconstructed as above described the die-is placed upon sheet material ina press with, for example, the left-blank cutting edge down and pressureis applied to the other edge-to force the die through the material.'Whenit is desired to produce right blanks the die is merely reversedand the operation repeated.

Having described my invention, what I claim as new and desire to secureby Letters Patent of the United States is:

1. A cutting die comprising two blade sections 'each of which has a bodyportion terminating in a'cutting edge and a flange portion in engagementwith the corresponding flange portion upon the other section, and meansfor clamping the two flange portions together.

2. A cutting die comprising a core plate, blade sections disposed uponopposite sides of the plate and having each a flange in engagement withthe plate anda body portion extending substantially at right angles tothe plate terminating in a cutting edge, and means'for securing togetherthe blade sections and core. a

3. A cutting die comprisinga blade shaped to correspond to the outlineof a blank to be produced and-having a flange extending laterally fromthe blade, a second blade shaped to correspond to theoutline of a blankto be produced and having a flange-positioned contiguously to thefirst-mentioned flange, and means for securing the flanges together. a

4. A cutting diecomprising a plate the outline of which correspondsapproximately to the outline of a blank'to be produced a cutting bladehaving a body portion terminating in a cutting edge and a flangedportion extending at right Eangles-to the body portion and in engagementwith one'side of the plate along the edges therei of, a second cuttinlade having .a body portion terminating in a-cutting edge and a flangeportion ex tending at right angles thereto located upon the plate on theopposite face thereof along the edge portions of the plate in alinementwith the firstmentioned cutting blade, andmeans forpermanently securingthe blades and plate 5. A cutting die comprising cutting membersterminating in oppositely disposed cutting edges shaped to correspond tothe outline-of blanks to be produced, two core plates positionedcentrally of the cutting members, and a marking member having a shankportion located between the plates and work engaging portions extendingoutwardly of the shank portion through openings in the plates.

6. A method of producing cutting dies which consists in providing apattern having edge portions corresponding in outline to those of blanksto be produced, bending a flanged cutting blade along the edge portionsof the pattern with the flange in engagement with one face of thepattern, bending a second flanged blade along the edge portions of thepattern with the flange in engagement with another face of the pattern,and securing the two blades together with the flanges contiguous to eachother.

7. The method of producing cutting dies which consists in providing aflanged cutting blade and a pattern corresponding to the outline of ablank to be produced, bending the blade along the pattern, utilizing theedge portions of one face of the pattern as a guide, bending a secondblade along the pattern, utilizing the edge portions of the other faceof the plate as a guide, assembling the two blades with their flangeportions adjacent to each other, and welding the blades together.

8. A method of producing dies which consists in forming a patterncorresponding in outline to that of a blank to be produced, bending aflanged blade along edge portions of the pattern while maintaining theflange of the blade in engagement with one face of the pattern, bendinga second flanged blade along the edge portions of the pattern whilemaintaining the flange of the second blade in engagement with theopposite face of the pattern, and permanently securing the flangestogether.

EDMOND HAUMONT.

